Figure 13.24 Example Of Communication Using The Sci Select Function - Hitachi H8S/2215 Series Hardware Manual

Master LSI
*
M_TxD
M_RxD
M_SCK
*
Note: * The selection signals (SEL_A and SEL_B) of the LSI must be switched while the serial
clock (M_SCK) is high after the end bit of the transmit data has been send. Note that one
selection signal can be brought low at the same time.

Figure 13.24 Example of Communication Using the SCI Select Function

Rev. 3.0, 10/02, page 406 of 686
Slave LSI_A (This LSI)
RxD0_A
RSR0_A
TxD0_A
SCK0_A
SCK0
C/A=CKE1=SSE=1
Slave LSI_B (This LSI)
RxD0_B
TxD0_B
SCK0_B
SCK0
Interrupt
controller
TSR0_A
Transmission/
reception
control